Ever increasing energy consumption, rising public awareness for environmental protection and higher
prices of fossil fuels have motivated many to look for renewable energy sources. SOFC is one of
the best alternative energy source but it is a highly nonlinear system. One of the main goals of
this research is designing a nonlinear control. In this thesis, non-isothermal model of solid oxide
fuel cell has been developed under the general condition of unchoked outlet flow. For isothermal
dynamic model of SOFC, a controller based on on full state feedback linearization is designed and
compared with controller based on linearization and gain scheduling. Analysis of controllability and
observability is also given for the nonlinear isothermal model
